
.box{
  width: 100%;
  height: 4.3rem;
  background: black;
  color: white;
  margin:auto;
  position:fixed;
  display: flex;
  top: 0px;
  z-index: 100;
}
img{
  width: 2.3rem;
  height: 2.3rem;
}
.close{
  margin:auto;
  margin-left: 1.5rem;
}
.title{
  margin: auto;
  font-size: 2rem;
}

.contain{
  margin: auto;
  margin-right: 1rem;
}

